[FFmpeg-devel] [PATCH 2/4] API: add AV_PKT_DATA_S12M_TIMECODE to AVPacketSideDataType

[lance.lmwang at gmail.com]

From: Limin Wang <lance.lmwang at gmail.com>

Signed-off-by: Limin Wang <lance.lmwang at gmail.com>
---
 doc/APIchanges        |  3 +++
 libavcodec/avpacket.c |  1 +
 libavcodec/decode.c   |  1 +
 libavcodec/packet.h   |  8 ++++++++
 libavcodec/version.h  |  2 +-
 libavformat/dump.c    | 22 ++++++++++++++++++++++
 6 files changed, 36 insertions(+), 1 deletion(-)

diff --git a/doc/APIchanges b/doc/APIchanges
index 1d6cc36..7cad7fa 100644
--- a/doc/APIchanges
+++ b/doc/APIchanges
@@ -15,6 +15,9 @@ libavutil:     2017-10-21
 
 API changes, most recent first:
 
+2020-06-xx - xxxxxxxxxx - lavc 58.94.100 - packet.h
+  Add AV_PKT_DATA_S12M_TIMECODE.
+
 2020-06-12 - b09fb030c1 - lavu 56.55.100 - pixdesc.h
   Add AV_PIX_FMT_X2RGB10.
 
diff --git a/libavcodec/avpacket.c b/libavcodec/avpacket.c
index dce26cb..a4316a7 100644
--- a/libavcodec/avpacket.c
+++ b/libavcodec/avpacket.c
@@ -400,6 +400,7 @@ const char *av_packet_side_data_name(enum AVPacketSideDataType type)
     case AV_PKT_DATA_PRFT:                       return "Producer Reference Time";
     case AV_PKT_DATA_ICC_PROFILE:                return "ICC Profile";
     case AV_PKT_DATA_DOVI_CONF:                  return "DOVI configuration record";
+    case AV_PKT_DATA_S12M_TIMECODE:              return "SMPTE 12-1 timecode";
     }
     return NULL;
 }
diff --git a/libavcodec/decode.c b/libavcodec/decode.c
index a4e50c0..a2bf0cc 100644
--- a/libavcodec/decode.c
+++ b/libavcodec/decode.c
@@ -1699,6 +1699,7 @@ int ff_decode_frame_props(AVCodecContext *avctx, AVFrame *frame)
         { AV_PKT_DATA_CONTENT_LIGHT_LEVEL,        AV_FRAME_DATA_CONTENT_LIGHT_LEVEL },
         { AV_PKT_DATA_A53_CC,                     AV_FRAME_DATA_A53_CC },
         { AV_PKT_DATA_ICC_PROFILE,                AV_FRAME_DATA_ICC_PROFILE },
+        { AV_PKT_DATA_S12M_TIMECODE,              AV_FRAME_DATA_S12M_TIMECODE },
     };
 
     if (pkt) {
diff --git a/libavcodec/packet.h b/libavcodec/packet.h
index 41485f4..72cb4f7 100644
--- a/libavcodec/packet.h
+++ b/libavcodec/packet.h
@@ -283,6 +283,14 @@ enum AVPacketSideDataType {
     AV_PKT_DATA_DOVI_CONF,
 
     /**
+     * Timecode which conforms to SMPTE ST 12-1. The data is an array of 4 uint32_t
+     * where the first uint32_t describes how many (1-3) of the other timecodes are used.
+     * The timecode format is described in the av_timecode_get_smpte_from_framenum()
+     * function in libavutil/timecode.c.
+     */
+    AV_PKT_DATA_S12M_TIMECODE,
+
+    /**
      * The number of side data types.
      * This is not part of the public API/ABI in the sense that it may
      * change when new side data types are added.
diff --git a/libavcodec/version.h b/libavcodec/version.h
index 0359302..482cc6d 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -28,7 +28,7 @@
 #include "libavutil/version.h"
 
 #define LIBAVCODEC_VERSION_MAJOR  58
-#define LIBAVCODEC_VERSION_MINOR  93
+#define LIBAVCODEC_VERSION_MINOR  94
 #define LIBAVCODEC_VERSION_MICRO 100
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
diff --git a/libavformat/dump.c b/libavformat/dump.c
index 117c681..c5f0bd6 100644
--- a/libavformat/dump.c
+++ b/libavformat/dump.c
@@ -34,6 +34,7 @@
 #include "libavutil/replaygain.h"
 #include "libavutil/spherical.h"
 #include "libavutil/stereo3d.h"
+#include "libavutil/timecode.h"
 
 #include "avformat.h"
 
@@ -402,6 +403,23 @@ static void dump_dovi_conf(void *ctx, AVPacketSideData* sd)
            dovi->dv_bl_signal_compatibility_id);
 }
 
+static void dump_s12m_timecode(void *ctx, AVPacketSideData* sd)
+{
+    uint32_t *tc = (uint32_t*)sd->data;
+    int m = tc[0] & 3;
+
+    if (sd->size != sizeof(uint32_t) * 4) {
+        av_log(ctx, AV_LOG_ERROR, "invalid data");
+        return;
+    }
+
+    for (int j = 1; j <= m; j++) {
+        char tcbuf[AV_TIMECODE_STR_SIZE];
+        av_timecode_make_smpte_tc_string(tcbuf, tc[j], 0);
+        av_log(ctx, AV_LOG_INFO, "timecode - %s%s", tcbuf, j != m ? ", " : "");
+    }
+}
+
 static void dump_sidedata(void *ctx, AVStream *st, const char *indent)
 {
     int i;
@@ -468,6 +486,10 @@ static void dump_sidedata(void *ctx, AVStream *st, const char *indent)
             av_log(ctx, AV_LOG_INFO, "DOVI configuration record: ");
             dump_dovi_conf(ctx, &sd);
             break;
+        case AV_PKT_DATA_S12M_TIMECODE:
+            av_log(ctx, AV_LOG_INFO, "S12M timecode: ");
+            dump_s12m_timecode(ctx, &sd);
+            break;
         default:
             av_log(ctx, AV_LOG_INFO,
                    "unknown side data type %d (%d bytes)", sd.type, sd.size);
-- 
1.8.3.1